Description
Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140.5 |
| Mozilla | Thunderbird | — | 140.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 140.5.0esr-1 | — |
| Debian 14 | thunderbird | 1:140.5.0esr-1 | — |
| Debian 13 | firefox-esr | 140.5.0esr-1~deb13u1 | DSA-6054-1 |
| Debian 13 | thunderbird | 1:140.5.0esr-1~deb13u1 | DSA-6059-1 |
| Debian 12 | firefox-esr | 140.5.0esr-1~deb12u1 | DSA-6054-1 |
| Debian 12 | thunderbird | 1:140.5.0esr-1~deb12u1 | DSA-6059-1 |
| Debian 11 | firefox-esr | 140.5.0esr-1~deb11u1 | DLA-4370-1 |
| Debian 11 | thunderbird | 1:140.5.0esr-1~deb11u1 | DLA-4372-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:140.7.1+build1-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | firefox +1 | 140.5.0-2.el10_1 | RHSA-2025:21843, RHSA-2025:21281 |
| RHEL 9 | firefox +2 | 140.5.0-1.el9_7 | RHSA-2025:21842, RHSA-2025:21280 |
| RHEL 8 | firefox | 140.5.0-1.el8_10 | RHSA-2025:22363 |
| RHEL 8 | thunderbird | 140.5.0-2.el8_10 | RHSA-2025:21881 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox | 140.5.0-2.el10_0 | RHSA-2025:21120 |
| RHEL 10.0 EUS | thunderbird | 140.5.0-1.el10_0 | RHSA-2025:21844 |
| RHEL 9.6 EUS | firefox +2 | 140.5.0-1.el9_6 | RHSA-2025:21841, RHSA-2025:21121 |
| RHEL 9.4 EUS | firefox +2 | 140.5.0-1.el9_4 | RHSA-2025:22449, RHSA-2025:22374 |
| RHEL 9.2 E4S | firefox +2 | 140.5.0-1.el9_2 | RHSA-2025:22450, RHSA-2025:22375 |
| RHEL 9.0 E4S | firefox +1 | 140.5.0-1.el9_0 | RHSA-2025:22451, RHSA-2025:22373 |
| RHEL 8.8 TUS | firefox +1 | 140.5.0-1.el8_8 | RHSA-2025:22882, RHSA-2025:22372 |
| RHEL 8.8 E4S | firefox +1 | 140.5.0-1.el8_8 | RHSA-2025:22882, RHSA-2025:22372 |
| RHEL 8.6 TUS | firefox +1 | 140.5.0-1.el8_6 | RHSA-2025:22883, RHSA-2025:22368 |
| RHEL 8.6 E4S | firefox +1 | 140.5.0-1.el8_6 | RHSA-2025:22883, RHSA-2025:22368 |
| RHEL 8.6 AUS | firefox +1 | 140.5.0-1.el8_6 | RHSA-2025:22883, RHSA-2025:22368 |
| RHEL 8.4 EUS Long Life | firefox +1 | 140.5.0-1.el8_4 | RHSA-2025:22791, RHSA-2025:22367 |
| RHEL 8.4 AUS | firefox +1 | 140.5.0-1.el8_4 | RHSA-2025:22791, RHSA-2025:22367 |
| RHEL 8.2 AUS | firefox +1 | 140.5.0-1.el8_2 | RHSA-2025:22792, RHSA-2025:22369 |
| RHEL 7 ELS | firefox | 140.5.0-1.el7_9 | RHSA-2025:22371 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox +1 | 140.5.0-2.el10_1 | ALSA-2025:21843, ALSA-2025:21281 |
| AlmaLinux 9 | firefox +1 | 140.5.0-1.el9_7.alma.1 | ALSA-2025:21280 |
| AlmaLinux 8 | firefox | 140.5.0-1.el8_10.alma.1 | ALSA-2025:22363 |
| AlmaLinux 8 | thunderbird | 140.5.0-2.el8_10.alma.1 | ALSA-2025:21881 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox +1 | 140.5.0-2.el10_1 | RLSA-2025:21843, RLSA-2025:21281 |
| Rocky Linux 9 | firefox | 140.5.0-1.el9_7 | RLSA-2025:21280 |
| Rocky Linux 8 | firefox | 140.5.0-1.el8_10 | RLSA-2025:22363 |
| Rocky Linux 8 | thunderbird | 140.5.0-2.el8_10 | RLSA-2025:21881 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.5.0-150200.8.245.1 | SUSE-SU-2025:4195-1 |
| SLES 15 SP6 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES 15 SP6 | MozillaThunderbird | 140.5.0-150200.8.245.1 | SUSE-SU-2025:4195-1 |
| SLES 15 SP5 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES 15 SP4 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES 15 SP3 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 140.5.0-112.289.1 | SUSE-SU-2025:4174-1 |
| SLES for SAP 16.0 | MozillaFirefox | 140.5.0-160000.1.1 | SUSE-SU-2025:21021-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLES 16.0 | MozillaFirefox | 140.5.0-160000.1.1 | SUSE-SU-2025:21021-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 145.0-1.1 | openSUSE-SU-2025:15735-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 140.5.0-1.1 | openSUSE-SU-2025:15738-1 |
| openSUSE Tumbleweed | firefox-esr | 153.0-1.1 | openSUSE-SU-2026:11373-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 140.5.0-160000.1.1 | openSUSE-SU-2025:20065-1 |
| openSUSE Leap 16.0 | MozillaThunderbird | 140.5.0-bp160.1.1 | openSUSE-SU-2026:20002-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 140.5.0-150200.152.210.1 | SUSE-SU-2025:4173-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 140.5.0-150200.8.245.1 | SUSE-SU-2025:4195-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.5.0-1.amzn2023.0.1 | ALAS2023-2025-1298 |
| Amazon Linux 2 | thunderbird | 140.6.0-1.amzn2.0.1 | ALAS2-2025-3108 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox +1 | 140.5.0-2.0.1.el10_1 | ELSA-2025-21843, ELSA-2025-21281 |
| Oracle Linux 9 | firefox +2 | 140.5.0-1.0.1.el9_7 | ELSA-2025-21842, ELSA-2025-21280 |
| Oracle Linux 8 | firefox | 140.5.0-1.0.1.el8_10 | ELSA-2025-22363 |
| Oracle Linux 8 | thunderbird | 140.5.0-2.0.1.el8_10 | ELSA-2025-21881 |
| Oracle Linux 7 | firefox | 140.5.0-1.0.1.el7_9 | ELSA-2025-22371 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140.5-r0 | — |
Advisories 50
- ALSA-2025:21281 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:21843 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:21280 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:21881 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:22363 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- openSUSE-SU-2026:11373-1 firefox-esr-153.0-1.1 on GA media SUSE / openSUSE Security Updates · Jul 26, 2026
- WID-SEC-2025-2566 Mozilla Firefox und Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2026
- RHSA-2025:22882 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22883 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22791 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22792 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22451 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22450 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22449 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22374 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22375 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22373 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22371 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22372 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22368 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22369 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22363 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:22367 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21881 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21844 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21842 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21843 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21841 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21281 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21280 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21120 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:21121 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- openSUSE-SU-2026:20002-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:20065-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15738-1 MozillaThunderbird-140.5.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15735-1 MozillaFirefox-145.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4195-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21021-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4174-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:4173-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2025-3108 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 5, 2026
- ELSA-2025-22371 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 15, 2025
- ALAS2023-2025-1298 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Dec 8, 2025
- ELSA-2025-21281 Important: firefox security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Dec 2, 2025
- ELSA-2025-21843 Important: thunderbird security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Dec 2, 2025
- RLSA-2025:22363 Important: firefox security update Rocky Linux Security Advisories · Dec 1, 2025
- ELSA-2025-22363 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 1, 2025
- ELSA-2025-21280 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 25, 2025
- ELSA-2025-21842 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 25, 2025
- RLSA-2025:21280 Important: firefox security update Rocky Linux Security Advisories · Nov 21, 2025